/*
 *   CalculationModel
 *   Copyright (C) 2012 Joe Huang
 *   
 * 	 This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * 2012/11/20 V0.7
 * Merge all the CalCommands into a single Calculation Model, I think this design is simpler and stupider.
 * 
 */
package calculator.model;

import java.util.Observable;

public abstract class CalculationModel extends Observable {

	public abstract String getInputs();
	public abstract String getAnswer();

	public abstract void doOperand(String btnName, String newInputs);
	public abstract void doOperator(String btnName, String newInputs);
	public abstract void doCalculation(String newInputs);
	public abstract void doBackSpace(String newInputs);
	public abstract void doClear();
	
}
